The trends related to movies are less disturbing compared with the change in how teens spend their time.
与青少年如何花时间的变化相比,与电影相关的趋势没有那么令人不安。
Some are so pressed for time that they change clothes in the taxi.
有些人时间紧迫,他们在出租车里换了衣服。
When Stevenson followed the carbon-14 trail back in time, he found carbon-14 levels change with the intensity of solar burning.
当史蒂文森依据碳-14的痕迹追溯过去时,他发现碳-14的含量随着太阳燃烧的强度而变化。
These incidents took place during a time of intense social and political change in the United States.
VOA: special.2010.02.25
It means that the properties of the system, the properties that describe the system, don't change in time or in space.
它的意思是指,用以描述系统的性质,不随时间或空间改变。
But luckily for us, there's a classical equation of motion that will, in fact, describe how the electron and nucleus change position or change their radius as a function of time.
但幸运的是,有一个,经典方程描述了电子和核子,位置或者它们直接的距离是,如何随时间变化的。
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